SPC Nov 14, 2017 2000 UTC Day 1 Convective Outlook

By Newsroom America Feeds at 14 Nov 14:35

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0131 PM CST Tue Nov 14 2017 Valid 142000Z - 151200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not expected across the contiguous United States today. ...20Z Update... ...Coastal Pacific Northwest... Sporadic lightning has been observed within the low-topped convection moving onto the Pacific Northwest coast. This general trend is expected to continue with some increase in coverage possible later tonight a strong shortwave trough approaches the region. Scant instability will temper storm strength and no severe thunderstorms are currently anticipated. ...Elsewhere.. Isolated thunderstorms are still anticipated within a warm-air advection regime from the Ozark Plateau into Lower OH River Valley late tonight and early tomorrow morning. Some isolated thunder also remains possible through evening along the eastern Florida coast. ..Mosier.. 11/14/2017 .PREV DISCUSSION... /ISSUED 1016 AM CST Tue Nov 14 2017/ ...Coastal Washington/north Oregon... Along an occluding front, morning CAMs consistently depict a QLCS gradually impinging on the Pacific Northwest coast tonight. Ahead of the front, low-level winds will strengthen as an upper low off the BC coast begins to accelerate east. But with paltry buoyancy along the coast, the offshore QLCS will likely weaken and be low-topped with little lightning. The risk for a waterspout moving ashore as a tornado appears negligible. ...Ozark Plateau to Illinois/southeast Iowa... Low-level warm advection will strengthen tonight with sufficient moistening to support weak elevated buoyancy and a risk for isolated to scattered elevated storms after 06Z. ...Florida East Coast... Moist northeasterly flow will support showers and isolated storms along the east coast convergence zone. Read more



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